Insulating material and process of manufacturing same



Jan. 16, 1923. 1,442,327. .I. D E 1.0 N 6..

INSULATING MATERIAL AND PROCESS OF MANUFACTURING SAME.

FILED APR.Z6, I922.

PATENT owners.

JULIUS DE LONG, OF LAKE MAHOPAC, NEW YORK.

INSULATING MATERIAL AND PROCESS OF MANUFACTURING SAME.

Application filed April 26, 1922.

To all whom it may concern:

Be it known that I, JULIUS DE LONG, a citizen of the United States,residing at Lake Mahopac, in the county of lPutnam and State of NewYork, have invented new and useful Improvements in Insulating Materialsand Processes of Manufacturing Same, of which the following is aspecification.

My invention relates to improvements in insulating material which areparticularly adapted for use in insulating railroad cars, buildings andother structures, and the objects of my invention are to produce a newinsulating material which can be cheaply and economically manufactured,which will be essentially fireproof in its character, and which is a farbetternonconductor of heat than the previous types of fireproofinsulating material heretofore in use, and which also possessessufficient rigidity to be easily handled and applied.

Reference is hereby made to the following pending applications by theapplicant relating to the same or kindred subject matter, namely: SerialNo. 432,649, Serial No. 517,923, and Serial No. 591,362.

Figure 1 is a perspective view of my insulating material with the layersof the material used partly broken away.

Figure 2 is an enlarged sectional view on the line XX of Figure 1.

In the drawings, 1 indicates the woven fabric; 2 the bats of asbestosfibre and cattle hair, and 3 the covering of asbestos paper.

Heretofore fireproof insulating material has been made from asbestosfibre, but in this type of insulating material the fibres were alwayssecured together by glue or other adhesive. material which tended toclose and fill the air spaces between the fibre and thereby greatlydecreasing the insulating value of such insulating material. Insulatingmaterial has also been formed by mingling asbestos fibre and cattlehair, but in the past these fibres have also been secured together bymeans of glue or other adhesive material which tended to fill the airspaces between the fibres and detracted from the insulating value of thematerial so formed. Material so formed is also liable to disintegrateand fall apart when damp or wet and therefore is undesirable for manypurposes for which insulating material is used.

I have found that I can make a strong,

Serial No. 556,579.

durable and more nearly fireproof insulat- 111g material by thefollowing process:

I run finely divided asbestos libre and cattle hair through a picker andform the commingled asbestos fibre and cattle hair into bats by runningit through a chine. I lay a bat so formed upon a strip of fireproofedburlap or other suitable noninflammable Woven fabric possessing thedesired strength and run the bat and burlap through a punching needleloom, the needles of such loom forcing the asbestos fibre and cattlehair through the woven fabric and interlapping the fibres of asbestosand cattle hair with each other and firmly securing the bat to the wovenmaterial. lVhen this operation is completed I turn the product over andplace another similarly formed bat upon the exposed surface of the wovenfabric and again run the material through the punching needle loom withthe result that the fibres of asbestos and cattle hair in the upper batare interlocked, and the fibres of the upper bat are driven through thewoven fabric and more or less interlocked with the asbestos fibre andcattle hair on the opposite side and the woven fabric. This produces astrong, durable felt which is a better nonconductor of heat than thematerial heretofore used and is at the same time essentially fireproof.

I prefer to use substantially equal quantities of asbestos fibre andcattle hair as this produces material which is strong, durable andessentially fireproof. These proportions may be varied, however, withoutdeparting from the spirit of my invention. Where burlap is used I treatthe burlap with a solution which renders it flame proof.

Where a rigid material is required, I ap- Ely adhesive material to thesurface of asestos paper or other suitable covering which I apply to oneor both of the outer surfaces of the felt formed as above stated. \Vhereasbestos paper is so applied and particularly where it is applied toboth sides of the felt the insulating value is increased because of thedead air trapped bet-ween the sheets of asbestos paper and the materialpossesses sufiicient rigidity and strength to be easily handled andapplied.

Having described my invention, I claim:

1. An insulating material comprising in combination noninflammable wovenfabric. bats composed of asbestos fibre and cattle hair on each side ofsaid noninfiammable carding ma- Woven fabric, the cattle hair andasbestos fibre in each bat being interlocked with each combinationnoninfiammable woven fabric,

bats composed of asbestos fibre and cattle hair on each side of saidnoninfiammable woven fabric, the cattle hair and asbestos fibre in eachbat being interlocked with each other, with the noninfiammable wovenfab- I ric and with the asbestos fibre and cattle hair 0f the bat on theopposite side of such noninfiammable woven fabric, and an asbestoscovering on each side thereof and secured thereto by adhesive material.7

3. An insulating material comprising in combination noninfiammable wovenfabric, bats composed of asbestos fibre and cattle hair arranged onopposite sides of such noninflammable Woven fabric and secured to eachother and to such noninfiammable woven fabric by interlocking theasbestos fibre and cattle hair of each bat with the asbestos fibre andcattle hair of the other bat and with such noninfiammable woven fabric.

4. An insulating material comprising in combination noninfiammable wovenfabric, bats composed of asbestos fibre and cattle hair arranged onopposite sides of such noninflammable woven fabric and secured to "eachother and to such noninfiammable woven fabric by interlocking theasbestos fibre and cattle hair of each bat with the asbestos fibre andcattle hair of the other bat and with such noninfiammable woven fabric,and an asbestos covering on each side thereof and secured thereto byadhesive material.

5. The process of making insulating material consisting of (1) passingasbestos fibre and cattle hair through a picking machine, (2) formingthe product thus obtained into a bat by passing the same through acarding machine, (3) arranging the bat so formed on noninfiammable wovenmaterial and securing the bat to the noninfiammable woven material bypassing both through a punching needle loom, (4) placing a bat formed asabove stated on the opposite side of the noninfiammable woven fabric andrunning the same through a punching needle loom.

Signed at New York, this 17th day of April, 1922.

JULIUS DE LONG.

